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Cooking conversion
Ounces of Cornstarch to Cups
How many cups of cornstarch are in a given weight? Type a number of ounces below to see the volume. Math uses cornstarch's density of 0.541 g/mL.
Calculator
100 oz of cornstarch = 22.1491 cup
Ounces of Cornstarch to Cups Conversion Table
Common values for cornstarch:
| Ounces of cornstarch | Cups |
|---|---|
| 10 oz | 2.2149 cup |
| 25 oz | 5.5373 cup |
| 50 oz | 11.0745 cup |
| 100 oz | 22.1491 cup |
| 150 oz | 33.2236 cup |
| 200 oz | 44.2982 cup |
| 250 oz | 55.3727 cup |
| 500 oz | 110.75 cup |
| 1000 oz | 221.49 cup |
How this works
Cornstarch has a density of about 0.541 g/mL (king arthur baking: 1 cup = 128g). That means 1 mL of cornstarch weighs 0.541 grams.
Cups = ounces × 0.2215
Note: Spooned and leveled.
Why a cup of cornstarch doesn't always weigh the same
Volume measurements are forgiving in some ways and brutal in others. A cup of cornstarch can vary by 10-20% in weight depending on how it's measured: spooned vs scooped, packed vs loose, sifted vs unsifted. The density figure used here matches the most common published recipe conventions, but if you're after baking precision, weighing on a kitchen scale is more accurate than measuring by volume.